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https://bugzilla.mozilla.org/show_bug.cgi?id=760735
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  <title>Test for Screen Orientation API</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=760735">Screen Orientation API</a>
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<pre id="test">
<script type="application/javascript">

/** Tests for Screen Orientation API **/

// Screen Orientation API testing is problematic in that not every platform
// supports orientation-locking, and locking requires running in full-screen.
// So for now, only negative/sanity testing is done here, as that works globally.

function unexpectedEvent(event) {
  ok(false, "No unexpected orientation change events received");
}

window.screen.addEventListener("mozorientationchange", unexpectedEvent);
try {
  const allowedOrientations = ["portrait-primary", "portrait-secondary",
                               "landscape-primary", "landscape-secondary"];

  var initialOrientation = window.screen.mozOrientation;

  // Sanity tests
  isnot(allowedOrientations.indexOf(initialOrientation), -1,
        "mozOrientation is valid (value=" + initialOrientation + ")");

  // Negative tests
  ok(!window.screen.mozLockOrientation("Foobar-Bazbam"), "Cannot lock to an invalid string");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(""), "Cannot lock to an empty string");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(["Foobar", "Bazbam"]), "Cannot lock to an invalid string");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(["foo"]), "Cannot lock to an invalid string");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation([""]), "Cannot lock to an empty string");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(42), "Cannot lock to a number");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(undefined), "Cannot lock to undefined");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(null), "Cannot lock to null");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation({}), "Cannot lock to a non-Array object");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(["Foobar", 42]), "Cannot lock to a number");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(["Foobar", null]), "Cannot lock to null");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");

  ok(!window.screen.mozLockOrientation(["Foobar", undefined]), "Cannot lock to undefined");
  is(window.screen.mozOrientation, initialOrientation, "Orientation is unchanged");
} catch (e) {
  ok(false, "Got unexpected exception: " + e);
} finally {
  window.screen.removeEventListener("mozorientationchange", unexpectedEvent);
}
</script>
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